Excuse me?!? Who the forget gave you the right to see my boobs >:[
If someone says something seemingly random like this, it's probably a meme. (This particular one comes from 4chan, like most of them. )
You're online. Don't take stuff like this personally. Admittedly it was a mistake for you to admit to being female in the first place, but there's no going back now.
Welcome to the forums. Try not to forget up too badly. Because you're going to, sooner or later.